How much electricity can the 11KW AC charging pile control board OCPP support photovoltaic storage charging collaboration and help zero carbon charging stations save?

The 11kW charging station control board supports photovoltaic storage charging collaboration through OCPP, and the electricity cost that can be saved for zero carbon charging stations is not a fixed number. It depends on the photovoltaic configuration of the station, the local peak valley electricity price difference, and the energy storage strategy. But the path and magnitude of savings have been clearly validated by industry practices.

Savings come from three levels, with the scale gradually increasing

First layer: Photovoltaic self use, directly reducing the cost of purchasing electricity

• OCPP 2.0.1 supports dynamic power limitation, and the control board can adjust the charging current based on real-time photovoltaic output.

• When the photovoltaic output is sufficient, it can be charged at full power, and when the output decreases, it can be synchronously reduced to avoid the reverse transmission of green electricity to the grid or being restricted.

• Industry data shows that this "photovoltaic priority" strategy can increase the photovoltaic self use rate from around 65% to over 80%.

• The comprehensive electricity cost of Shenzhen Pinsheng Longgang Demonstration Station has been reduced to 0.46 yuan/kWh, which is about 30% lower than traditional charging stations.

• Taking the 11kW single pile as an example, with the existing three-phase household and photovoltaic conditions, the photovoltaic priority charging strategy can save about 800-1500 yuan in annual electricity bills.

Second layer: Energy storage peak valley arbitrage, earning electricity price difference

• The OCPP control board, as the execution node of EMS, can command energy storage to charge during valley periods and discharge during peak periods for use by charging stations.

• The larger the peak valley price difference, the more significant the return. A site in Zhejiang province utilized energy storage at a low point of 0.3 yuan/kWh for electricity storage and 1.2 yuan/kWh for discharge during peak periods, resulting in a daily arbitrage profit of over 10000 yuan.

• Taking the 241kWh air-cooled energy storage cabinet as an example, with 330 charging and discharging cycles per year and a 91% efficiency calculation, the annual arbitrage profit is about 70000 yuan; The 261kWh liquid cooling cabinet can reach 76000 yuan.

• In the station level profit structure, energy storage peak valley arbitrage usually accounts for 10% -15%.

Level 3: Demand electricity management to avoid peak penalties

• This is the most easily overlooked but most direct cost saving option.

• Commercial real estate charges basic electricity fees based on higher demand, and centralized activation of charging stations can easily trigger high demand.

• The dynamic power limiting function of OCPP can automatically reduce the single pile power when the charging load is about to push up the total demand, and cooperate with energy storage discharge to smooth out the peak.

• After installing a 500kW/1045kWh energy storage system, maintaining the transformer power within 800kW can reduce the basic electricity bill by about 20000 yuan per month.

• A certain park saves over one million yuan in electricity bills annually through demand management.

Key variables determine the extent of savings

• How much can be saved depends on three variables: the local peak valley electricity price difference (the larger the price difference, the more significant the energy storage arbitrage), the matching degree between photovoltaic installed capacity and charging load (the higher the matching degree, the greater the proportion of green electricity substitution), and the configuration of energy storage capacity (if the capacity is insufficient, the price difference benefits cannot be fully captured).

• In regions with large peak valley price differences and good photovoltaic resources such as Guangdong and Zhejiang, the yield of integrated photovoltaic storage and charging projects has been able to increase to 8% -12%.

one-sentence summary

The 11kW charging pile control board supports photovoltaic storage charging collaboration through OCPP, saving annual electricity costs of 800-1500 yuan per pile; Scaling up to the site level, in conjunction with the triple synergy of photovoltaic self use, energy storage arbitrage, and demand management, reducing comprehensive electricity costs by 30% has become a validated benchmark in the industry. The essence of saving is not 'using less electricity', but 'using the right electricity' - ensuring that every kilowatt hour of electricity is used at the right time and at the right price.

The communication charging pile control board produced by Xincheng Technology is of high quality and good price. Welcome to inquire and purchase!